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Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting
Wang, L. Y.1,2; Wang, Y. C.1,2; Zhou, Z. J.3; Wan, H. Y.1,2; Li, C. P.3; Chen, G. F.3; Zhang, G. P.1
Corresponding AuthorZhang, G. P.(gpzhang@imr.ac.cn)
2020-10-01
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume195Pages:15
AbstractCreep performance of additively-manufactured components is strongly related to additive manufacturing process-induced microstructures and loading direction. Here, the creep life and the cracking behavior of Inconel 718 fabricated by selective laser melting were investigated systematically at 650 degrees C and 400 N by means of the small punch creep testing method. The results show that the periodic and spatially heterogeneous microstructures composed of V-shaped grains and columnar grains are produced, and play an important role in the creep performance. Under the same heat-treatment condition, the creep resistance of the specimens loaded along the scanning direction is much higher than that of the ones loaded along the building direction. While under the same loading direction, homogenization/aging-treated specimens have the longest creep life and the solution/aging-treated specimens are of the shortest creep life. The creep cracking mechanism of the alloy associated with the spatially heterogeneous microstructures was elucidated. The theoretical calculation suggests that the higher energy input or the larger overlap ratio of the melting pools may decrease the area fraction of the V-shaped grains to enhance the creep life. The finding provides a potential strategy to design microstructures for the high creep performance of selective laser melting-fabricated Inconel 718. (c) 2020 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
KeywordInconel 718 Small punch creep test Selective laser melting Cracking
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; project of 'Manufacturing the swirl nozzles of the high-pressure turbine by selective laserMelting' ; Fundamental Research Project of Shenyang National Laboratory for Materials Science
DOI10.1016/j.matdes.2020.109042
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51771207] ; project of 'Manufacturing the swirl nozzles of the high-pressure turbine by selective laserMelting' ; Fundamental Research Project of Shenyang National Laboratory for Materials Science[L2019R18]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000576531100011
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140886
Collection中国科学院金属研究所
Corresponding AuthorZhang, G. P.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Siemens Ltd, Corp Technol, Mat & Mfg Qualificat Grp, Beijing 100102, Peoples R China
Recommended Citation
GB/T 7714
Wang, L. Y.,Wang, Y. C.,Zhou, Z. J.,et al. Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting[J]. MATERIALS & DESIGN,2020,195:15.
APA Wang, L. Y..,Wang, Y. C..,Zhou, Z. J..,Wan, H. Y..,Li, C. P..,...&Zhang, G. P..(2020).Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting.MATERIALS & DESIGN,195,15.
MLA Wang, L. Y.,et al."Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting".MATERIALS & DESIGN 195(2020):15.
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